In the course of time, I have installed nvida-current software on almost all of my systems, because they all have got NVidia Graphics Cards. And I have never experienced the problem that after installing nvidia-current and nvidia-settings, rebooting and logging in

on Mint 13 I received a complaint that the Ubuntu session could not be launched. No Ubuntu session present anyway, because on Mint there is+ either Cinnamon, Cinnamon 2D, Gnome 3, Gnome 3 fallback ... (applies to the Cinnamon edition)+ or XFCE, Gnome 3, Gnome 3 fallback ... (applies to the XFCE edition)

on Ubuntu 12.04 I received a complaint that the Ubuntu session could not be launched.This would have been a problem, because on my Ubuntu system, the Ubuntu session is actually the Unity desktop.

So, now knowing we are really talking about a genuine Mint 13 Cinnamon, have you tried this:When the logon screen appears, click on the middle icon, the one which will give you a list of available session types. Select "Cinnamon" there and you should be fine.In case this does not work, please, post back.

As you mentioned the file xorg.conf in the Ubuntu forum:Could you please post the content of the file? And where did you put it?Actually, my Mint 14 Cinnamon, using nvidia-current (v304.64, to be precise), does not have an xorg.conf file anywhere.

The problem is that these commands weren't persistent and I had to run them every time I booted. In order to fix that I tried modifying my xorg.conf file, but I didn't have one initially, and once I created one it wasn't loaded.

After installing my nVidia drivers, it did not boot with a user interface. I logged into my account and typed "startx", and I get the message "Could not start session: ubuntu".

I am going to try installing "nvidia-current" this time as you suggested. I do not have Cinnamon, I only have MATE installed.

As requested, here is the xorg.conf file (which was automatically generated in /etc/X11/ by nvidia-xconfig):

As for the forum posts, yes, sorry about that, I've mentioned I have Ubuntu because the first time I claimed I had Mint they moved the post to "Other OS" category which isn't as frequented as the "Hardware" section.Since I already had an account on those forums and the distro's are similar, my first thought was to post the problem there.